"In my life, I never imagined I'd experience something so beautiful," the fiddle player writes. "We are completely in love with our 2 day old, sweet baby girl ..."

Slaver had been documenting goings-on during her pregnancy on her Instagram account, including sharing a funny photo of Carmack wearing fake pregnancy suit.

Carmack and Slaver got engaged earlier this year. Nashville fans, of course, know Carmack for his role as Will Lexington, but they might know Slaver, too: She played one of Juliette Barnes’ (Hayden Panettiere) backup singers during the show’s first two seasons.

In addition to his role as Lexington, Carmack released an EP, Pieces of You, in December of 2015. He acknowledges that that without his role on Nashville, he may have never had the courage to release the project.

“The music is something I’ve always done and always loved but always really kept for myself,” Carmack says. “Something I do for me. I never really intended on giving it a stab, but the opportunities that have presented themselves through the show have made it clear that I really need to, for my own sanity. If I was to let these opportunities go by without ever giving it a try, I would probably regret it for the rest of my life, so I’m giving it a go.”

Season 5 of Nashville will premiere on CMT on Jan. 5. The network picked up the show for a fifth season in early June, following ABC’s cancellation of the TV drama in mid-May, and thanks in part to fan demand. Nashville will be broadcast and streamed on CMT, and also streamed on Hulu, which currently carries the show’s previous seasons.